Trigger mechanism for automatic firearms.



P. MAUSER. TRIGGER MECHANISM PQR AUTOMATIC FIREARMS.

APPLICATION FILED ROY. 19, 1909.

Patented Aug. 1, 1911.

2/ bar .2. a OJ 3 H i IN N, 4 J n I a Li I l l 115- may be fired in series.

, view the preferred arrangement .1 is such tion a recoil loader with fixed barrel has "UNITED STATES PATENT OFFICE.

PAUL MAUSER, or 0311mmoRr-oN-rnn-Nncmn,. GERMANY.

of Wiirtemberg, Germany, have invented certain-new anduseful Improvements Relating to Trigger Mechanlsm for Automatic Firearms, of which the following is a full, clear, and exact description.

The present invention relates to trigger mechanism for automatic fire arms, the

novelty consisting of an improved device by means of which any number of shots Withthisend 'in that the adjustment of a locking lever pivoted behind the trigger prevents the latter from moving. backward, so that although the trigger can be pulled a certain distance it cannot be pulled through its complete motion and consequently the sear'controlled l lever is not released by the-sear and as it 1s not able to return to its engaging position it is compelled to remain in :the d1sengaged POSltIOIl as long as the trigger is" pulled back.

.The invention is illustrated in the ac-.

' companying drawing in which-- Figure 1 is a longitudinal section of the .rear part of the weapon with the locking lever out of engagementfor-single firing. Fig. 2 isa similar view showing the parts set for repeat firing. For the purpose of illustrating the invenbeen adopted. The gun illustrated is of the general construction disclosed in my application S. No. 514,894, filed August 27, The general "arrangement of the trigger mechanism is the usual one, the sear controlled lever 8'? being pivoted to the pin 8 on the underside of the minor breech g which contains the hollow firing pin 7 and propelling spring n and is inserted in the rear wall of the casing h. This sear con- ,trolledlever. s carries the usual; upwardly,

projecting catch .9 as well as, a downwardly projecting hook or catch 8 which engages with .a corresponding catch 2 on the sear 2 The sear z is provided underneath this catch a with another catch a which engages with the rear end-t of the safety lever t the object of the latter being, as 1s generally known, to tprevent the rifle being fired in the event 0 the locking not hav- Specification of Letterslatent. j

'- TRIGGER MECHANISM FOR AUTOMATIC FIREARMS.

Patented Aug. 1, 1-911.

Application filed November 19, 1909. Seria'l No. 528,976.

ing been completely efi'ected (that is, when the supporting or looking levers have not reached the locking position). The scar 2 (provided with these two hooks or catches) is pivoted to the trigger 2, which as usual is pivoted to the pin 2 in the stock 9.

According to the invention the locking lever m is preferably pivoted behind the trigger, the lower end m of said locking lever being provided with a handle projecting out into ,the open, while the upper end has an inclined nose of. w

The sear 2 (which, as previously mentioned, is pivoted to the trigger a) has on its. trunnion a side piece y, the engaging surf face 3 of which, when the trigger is pulled Qfarther back, after having released the firing pin, meets an inclined sliding surface a on a block a located in the stock and thus effects the withdrawal of the catch- .e? from the hook or catch 8 of the sear controlled lever 8 so that the same can leavethe sear and assume its engaging position for the next shot even if the trigger is not released. This piece, 3 has on its lower end a notch 11 which cooperates with the nose m of the locking lever m in such man.- ner that when the lever m is adjusted with its upper end projecting forward and the trigger is pulled, the piece y by its notch 11 engages the projecting nose m of the looking lever :12. Consequently the firing pin is released it istrue, as shown in Fig. 2,

that is to say, the sear controlled lever s is moved downwardfar enough to disengage the catch 8 from the nose on the firing pin; the trigger cannot,- however, be moved farther, so that the trigger cannot be pulled through its complete motion but is compelled to remain in the position shown 1n Fig. 2. In this position the sear 2 holds the sear controlled lever s in the unlocked position so that it cannot return to its posi-- tion of engagement with the firlng pin, and,

consequently, allows as many shots to be repeatedly fired as there are cartridges in the magazine.

The cam slide a which operates in the generally known manner the locking levers supporting the receiver is, has a rearward extending spring tongue al provided at its 1 rear end with a projection q? corresponding with the hook p of a lever 22 pivotally mounted upon the minor breech g. The nose p ofthe lever 12 projects downward and cooperates with a correspondingrecess r of the firing pin a". The lever 72 is actuated by a spirahspring 79 which tends to hold the lever pin the engaging or locking position as shown in Fig. 2, when the breech is not closed. Only after the breech has been duly looked that is to say when the cam slide a is situated in its backward'position shown in Fig. 1 in which it holds the supporting levers in their inward and locking postion, the lever p is held in the raised position against the pressure of the spring 2 by the tongue engaging with the book 39 of the lever 72. The nose r of the firing pin 1' is then released from the nose of the lever 79, and the firing pin can move forward.

What I claim as my invention and desire to secure by Letters Patent is:

1.. In an automatic fire-arm, the combination of a trigger, a firing-device, a sear having an'a-rm thereon, a catchsdevice controlled by the sear for engaging and releasing said firing device, and a manually operable stop adapted to engage said arm ofthe sear for limiting the movement of said sear, whereby when the trigger is maintained pulled said. catch device is moved out of engagement with said firing-device without being released, and the fire-arm is adapted for automatic firing. v

2. In an automatic firearm, the combination of a trigger, a firing device, a Sear, a catch device controlled by said sear for engaging and releasing said firing device, said sear being movable relatively to said trigger to engage and release said catch device and means for limiting the relative movement of said sear, whereby when the trigger is maintained pulled said catch, device is moved out of engagement with .said firing device without being released by said sear mechanism during repeated firing,

releasing movement thereof.

4. In an automatic firearm, the combina tion of a trigger, a firing mechanism, a catch lever cont-rolled by the sear for engaging and releasing said firing mechanism, a sear adapted to engage said catch mechanism, move it to its retracted position and release it duringv single firing, and means for preventing said sear from releasing said catch mechanism during repeated. fire, said mechanism comprising apart connected with said sear, means for moving said part to release said sear, and a catch adapted in one position to=permit said release and in'another position to engage said part to prevent a complete movement thereof whereby when the parts are in the last-named position and the trigger is held retracted said sear-controlled catch is held outof its engaging position so that the firing mechanism acts automatioally.

In witness whereof, I have hereunto signedmy name in the presence of two sub- PAUL MAUSER.

scribing witnesses.

Witnesses ERNEST ENTLMNANY, FRIDA KLAIBER. 

